{"product_id":"sourdough-starter-san-francisco-style","title":"Dough Dough Fast Start Sourdough Starter — Lab-Verified Lactobacillus sanfranciscensis Culture","description":"\u003cp\u003e\u003cstrong\u003eThe world's first and only 2-hour sourdough starter — independently verified by genetic sequencing to contain Lactobacillus sanfranciscensis, the authentic San Francisco culture.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eOur shelf-stable starter has been laboratory tested at NCIMB and confirmed to contain \u003cem\u003eLactobacillus sanfranciscensis\u003c\/em\u003e as its dominant lactic acid bacteria. This is the same organism responsible for the iconic tang and open crumb structure of authentic San Francisco sourdough bread — and it is now available in the UK for the first time in a format that activates in just 2 hours.\u003c\/p\u003e\n\n\u003cp\u003eJust add flour and water. The culture springs back to life within 2 hours, ready to bake with immediately. Works with any flour — bread flour, wholemeal, rye, spelt, or '00'. No 7-day setup. No guesswork. Just real, authenticated San Francisco sourdough, starting today.\u003c\/p\u003e\n\n\u003ch2\u003eWhat is San Francisco sourdough starter?\u003c\/h2\u003e\n\n\u003cp\u003eSan Francisco sourdough is the traditional bread made in San Francisco Bay Area bakeries since the 1849 Gold Rush. Its distinctive sharp tang comes from a specific bacterium — \u003cem\u003eLactobacillus sanfranciscensis\u003c\/em\u003e (recently reclassified as \u003cem\u003eFructilactobacillus sanfranciscensis\u003c\/em\u003e) — first isolated from the Boudin Bakery starter in 1971 and named for the city where it was discovered.\u003c\/p\u003e\n\n\u003cp\u003eThis bacterium produces both lactic acid (the mellow yoghurt-like note) and acetic acid (the sharp vinegary tang) in a ratio that no other sourdough culture matches. It's why a proper San Francisco loaf tastes different from any other sourdough in the world.\u003c\/p\u003e\n\n\u003ch2\u003eWhere to buy an authentic San Francisco sourdough starter in the UK\u003c\/h2\u003e\n\n\u003cp\u003eUntil now, if you wanted a verified San Francisco sourdough starter in the UK you had to import one from a specialist US bakery — a slow, expensive process that often ended with a stressed or dead culture arriving. Or you took a chance on an unverified \"SF-style\" starter sold by a British seller with no lab evidence to back the claim.\u003c\/p\u003e\n\n\u003cp\u003eDough Dough at Home solves this. We ship from London, our culture is genetically confirmed, and it ships fully dehydrated so it survives Royal Mail unfazed. Reactivates in 2 hours in your kitchen. First loaf in under 24 hours.\u003c\/p\u003e\n\n\u003ch2\u003eWhy our starter is different\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLab-verified.\u003c\/strong\u003e Independent DNA sequencing confirms the presence of Lactobacillus sanfranciscensis as the dominant lactic acid bacterium. Most competing starters have no lab evidence at all.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast activation.\u003c\/strong\u003e 2 hours from packet to bakeable starter. Traditional dehydrated starters take 5–7 days of feedings before they can leaven bread.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShelf-stable.\u003c\/strong\u003e Store the sealed packet in a cool dry cupboard for up to 12 months. Reactivate whenever you're ready to bake.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal flour compatibility.\u003c\/strong\u003e Works with strong white bread flour, wholemeal, rye, spelt, khorasan, and Italian '00'. Adjust hydration to your flour, not your starter.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUK-made, UK-shipped.\u003c\/strong\u003e Dehydrated and packed in London. Royal Mail 1st Class. Usually arrives next working day.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow to use — three-step activation\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMix\u003c\/strong\u003e the sachet contents with 60g strong white bread flour and 60g room-temperature filtered water in a clean jar.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWait 2 hours\u003c\/strong\u003e at room temperature (20–24°C). You'll see bubbles forming and hear a soft crackle — the culture is active.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFeed once\u003c\/strong\u003e with an equal weight of flour + water, and you have a mature levain ready to build your first dough.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003eFull step-by-step instructions ship in every packet, plus a link to our free online \u003ca href=\"\/pages\/how-to-feed-care-for-your-sourdough-starter\"\u003eStarter Care Guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eWhat you get\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eOne 5g sachet of dehydrated Lactobacillus sanfranciscensis culture\u003c\/li\u003e\n  \u003cli\u003eDetailed printed instructions\u003c\/li\u003e\n  \u003cli\u003eAccess to our free Starter Guide + 35 tested recipes\u003c\/li\u003e\n  \u003cli\u003eDirect WhatsApp support from Maria if you get stuck\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\n\u003ch3\u003eHow long does the starter last?\u003c\/h3\u003e\n\u003cp\u003eUnopened, the dehydrated sachet lasts 12 months in a cool dry cupboard. Once activated and maintained with regular feedings, your live starter will last indefinitely — many bakers have starters going strong after decades.\u003c\/p\u003e\n\n\u003ch3\u003eIs this the same as San Francisco sourdough bakery starters?\u003c\/h3\u003e\n\u003cp\u003eThe dominant bacterium is the same — Lactobacillus sanfranciscensis. Every mature starter develops its own ratio of secondary microbes based on the flour and environment you feed it, so after a few weeks your starter will develop its own house character. But the foundational culture is authentic SF.\u003c\/p\u003e\n\n\u003ch3\u003eCan I use tap water?\u003c\/h3\u003e\n\u003cp\u003eFiltered or bottled water is best. UK tap water is often chlorinated, and chlorine kills lactic acid bacteria. Leaving tap water uncovered for 30 minutes before use lets most of the chlorine dissipate as a workaround.\u003c\/p\u003e\n\n\u003ch3\u003eWhat flour should I use for my first loaf?\u003c\/h3\u003e\n\u003cp\u003eStrong white bread flour is the easiest starting point. Once your starter is established and you understand its rhythm, experiment with wholemeal, rye, or spelt — see our \u003ca href=\"\/pages\/flour-guide\"\u003eFlour Guide\u003c\/a\u003e for a complete rundown.\u003c\/p\u003e\n\n\u003ch3\u003eDo you ship outside the UK?\u003c\/h3\u003e\n\u003cp\u003eWe ship across the UK as standard. For international enquiries (EU, US, Australia), contact us at \u003ca href=\"mailto:hello@doughdoughathome.com\"\u003ehello@doughdoughathome.com\u003c\/a\u003e — we can arrange International Tracked shipping.\u003c\/p\u003e\n\n\u003ch3\u003eWhat if my starter doesn't activate?\u003c\/h3\u003e\n\u003cp\u003eIn 4 years we've had this happen fewer than 5 times, and it's always been solvable. Message us on WhatsApp or email — we'll troubleshoot with you or send a replacement sachet. Read our \u003ca href=\"\/pages\/sourdough-starter-troubleshooting\"\u003eTroubleshooting Guide\u003c\/a\u003e for common issues.\u003c\/p\u003e\n\n\u003cp style=\"margin-top:2rem;\"\u003e\u003ca href=\"\/pages\/recipes\"\u003e\u003cstrong\u003eBrowse all 35 sourdough recipes →\u003c\/strong\u003e\u003c\/a\u003e · \u003ca href=\"\/pages\/gluten-free-recipes\"\u003e\u003cstrong\u003eSee the Gluten-Free section →\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"How long does the starter last?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Unopened, the dehydrated sachet lasts 12 months in a cool dry cupboard. Once activated and maintained with regular feedings, your live starter will last indefinitely — many bakers have starters going strong after decades.\"}},\n{\"@type\":\"Question\",\"name\":\"Is this the same as San Francisco sourdough bakery starters?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The dominant bacterium is the same — Lactobacillus sanfranciscensis. Every mature starter develops its own ratio of secondary microbes based on the flour and environment you feed it, so after a few weeks your starter will develop its own house character. But the foundational culture is authentic SF.\"}},\n{\"@type\":\"Question\",\"name\":\"Can I use tap water for my sourdough starter?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Filtered or bottled water is best. UK tap water is often chlorinated, and chlorine kills lactic acid bacteria. Leaving tap water uncovered for 30 minutes before use lets most of the chlorine dissipate as a workaround.\"}},\n{\"@type\":\"Question\",\"name\":\"What flour should I use for my first sourdough loaf?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Strong white bread flour is the easiest starting point. Once your starter is established and you understand its rhythm, experiment with wholemeal, rye, or spelt.\"}},\n{\"@type\":\"Question\",\"name\":\"Do you ship outside the UK?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"We ship across the UK as standard. For international enquiries (EU, US, Australia), contact us at hello@doughdoughathome.com — we can arrange International Tracked shipping.\"}},\n{\"@type\":\"Question\",\"name\":\"What if my sourdough starter doesn't activate?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"In 4 years this has happened fewer than 5 times, and it's always been solvable. Message us on WhatsApp or email — we'll troubleshoot with you or send a replacement sachet.\"}}\n]}\n\u003c\/script\u003e","brand":"Dough Dough","offers":[{"title":"Default Title","offer_id":53401356304732,"sku":"","price":11.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0855\/5171\/0556\/files\/dough-dough-packaging.png?v=1783950393","url":"https:\/\/doughdoughathome.com\/products\/sourdough-starter-san-francisco-style","provider":"Dough Dough","version":"1.0","type":"link"}